package com.ys.gulimall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ys.common.constant.ProductConstant;
import com.ys.common.utils.PageUtils;
import com.ys.common.utils.Query;
import com.ys.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.ys.gulimall.product.dao.AttrDao;
import com.ys.gulimall.product.dao.AttrGroupDao;
import com.ys.gulimall.product.dao.CategoryDao;
import com.ys.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.ys.gulimall.product.entity.AttrEntity;
import com.ys.gulimall.product.entity.AttrGroupEntity;
import com.ys.gulimall.product.entity.CategoryEntity;
import com.ys.gulimall.product.service.AttrService;
import com.ys.gulimall.product.service.CategoryService;
import com.ys.gulimall.product.vo.AttrGroupRelationVo;
import com.ys.gulimall.product.vo.AttrRespVo;
import com.ys.gulimall.product.vo.AttrVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {
	
	@Resource
	private AttrAttrgroupRelationDao relationDao;
	@Resource
	private AttrGroupDao attrGroupDao;
	@Resource
	private CategoryDao categoryDao;
	@Resource
	private CategoryService categoryService;
	
	@Override
	public PageUtils queryPage(Map<String, Object> params) {
		IPage<AttrEntity> page = this.page(
				new Query<AttrEntity>().getPage(params),
				new QueryWrapper<AttrEntity>()
		);
		
		return new PageUtils(page);
	}
	
	@Transactional(rollbackFor = Exception.class)
	@Override
	public void saveAttr(AttrVo attr) {
		AttrEntity attrEntity = new AttrEntity();
		BeanUtils.copyProperties(attr, attrEntity);
		//1、保存基本数据
		this.save(attrEntity);
		
		//2、保存关联关系
		//判断类型，如果是基本属性就设置分组id
		if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
			AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
			relationEntity.setAttrGroupId(attr.getAttrGroupId());
			relationEntity.setAttrId(attrEntity.getAttrId());
			relationDao.insert(relationEntity);
		}
		
	}
	
	@Override
	public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String attrType) {
		QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
				                                        .eq("attr_type", "base".equalsIgnoreCase(attrType) ?
						                                                         ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() :
						                                                         ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());
		
		//根据catelogId查询信息
		if (catelogId != 0) {
			queryWrapper.eq("catelog_id", catelogId);
		}
		
		String key = (String) params.get("key");
		if (!StringUtils.isEmpty(key)) {
			//attr_id attr_name
			queryWrapper.and((wrapper) -> {
				wrapper.eq("attr_id", key).or().like("attr_name", key);
			});
		}
		
		IPage<AttrEntity> page = this.page(
				new Query<AttrEntity>().getPage(params),
				queryWrapper
		);
		
		PageUtils pageUtils = new PageUtils(page);
		List<AttrEntity> records = page.getRecords();
		
		List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
			AttrRespVo attrRespVo = new AttrRespVo();
			BeanUtils.copyProperties(attrEntity, attrRespVo);
			
			//设置分类和分组的名字
			if ("base".equalsIgnoreCase(attrType)) {
				AttrAttrgroupRelationEntity relationEntity =
						relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
				if (relationEntity != null && relationEntity.getAttrGroupId() != null) {
					AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(relationEntity.getAttrGroupId());
					attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
				}
			}
			
			CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
			if (categoryEntity != null) {
				attrRespVo.setCatelogName(categoryEntity.getName());
				
			}
			return attrRespVo;
		}).collect(Collectors.toList());
		
		pageUtils.setList(respVos);
		return pageUtils;
	}
	
	@Override
	@Cacheable(value = "attr", key = "'attrInfo'+#root.args[0]")
	public AttrRespVo getAttrInfo(Long attrId) {
		//查询详细信息
		AttrEntity attrEntity = this.getById(attrId);
		
		//查询分组信息
		AttrRespVo respVo = new AttrRespVo();
		BeanUtils.copyProperties(attrEntity, respVo);
		
		//判断是否是基本类型
		if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
			//1、设置分组信息
			AttrAttrgroupRelationEntity relationEntity = relationDao.selectOne
					                                                        (new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
			if (relationEntity != null) {
				respVo.setAttrGroupId(relationEntity.getAttrGroupId());
				//获取分组名称
				AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(relationEntity.getAttrGroupId());
				if (attrGroupEntity != null) {
					respVo.setGroupName(attrGroupEntity.getAttrGroupName());
				}
			}
		}
		
		//2、设置分类信息
		Long catelogId = attrEntity.getCatelogId();
		Long[] catelogPath = categoryService.findCatelogPath(catelogId);
		
		respVo.setCatelogPath(catelogPath);
		CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
		if (categoryEntity != null) {
			respVo.setCatelogName(categoryEntity.getName());
		}
		
		return respVo;
	}
	
	@Transactional(rollbackFor = Exception.class)
	@Override
	public void updateAttrById(AttrVo attr) {
		
		AttrEntity attrEntity = new AttrEntity();
		BeanUtils.copyProperties(attr, attrEntity);
		
		this.updateById(attrEntity);
		
		if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
			//1、修改分组关联
			AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
			relationEntity.setAttrGroupId(attr.getAttrGroupId());
			relationEntity.setAttrId(attr.getAttrId());
			
			Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>()
					                                        .eq("attr_id", attr.getAttrId()));
			
			if (count > 0) {
				relationDao.update(relationEntity,
						new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
			} else {
				relationDao.insert(relationEntity);
			}
		}
		
	}
	
	/**
	 * 根据分组id找到关联的所有属性
	 *
	 * @param attrgroupId
	 * @return
	 */
	@Override
	public List<AttrEntity> getRelationAttr(Long attrgroupId) {
		
		List<AttrAttrgroupRelationEntity> entities =
				relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));
		
		List<Long> attrIds = entities.stream().map((attr) -> {
			return attr.getAttrId();
		}).collect(Collectors.toList());
		
		//根据attrIds查找所有的属性信息
		//Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
		
		//如果attrIds为空就直接返回一个null值出去
		if (attrIds == null || attrIds.size() == 0) {
			return null;
		}
		
		List<AttrEntity> attrEntityList = this.baseMapper.selectBatchIds(attrIds);
		
		return attrEntityList;
	}
	
	@Override
	public void deleteRelation(AttrGroupRelationVo[] vos) {
		//relationDao.delete(new QueryWrapper<>().eq("attr_id",1L).eq("attr_group_id",1L));
		
		List<AttrAttrgroupRelationEntity> entities = Arrays.stream(vos).map((item) -> {
			AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
			BeanUtils.copyProperties(item, relationEntity);
			return relationEntity;
		}).collect(Collectors.toList());
		
		relationDao.deleteBatchRelation(entities);
	}
	
	/**
	 * 获取当前分组没有被关联的所有属性
	 */
	@Override
	public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
		
		//1、当前分组只能关联自己所属的分类里面的所有属性
		AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
		//获取当前分类的id
		Long catelogId = attrGroupEntity.getCatelogId();
		
		//2、当前分组只能关联别的分组没有引用的属性
		//2.1）、当前分类下的分组
		List<AttrGroupEntity> groupEntities =
				attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>()
						                        .eq("catelog_id", catelogId));
		
		//获取到所有的attrGroupId
		List<Long> collect = groupEntities.stream().map((item) -> {
			return item.getAttrGroupId();
		}).collect(Collectors.toList());
		
		
		//2.2）、这些分组关联的属性
		List<AttrAttrgroupRelationEntity> groupId =
				relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
		
		List<Long> attrIds = groupId.stream().map((item) -> {
			return item.getAttrId();
		}).collect(Collectors.toList());
		
		//2.3）、从当前分类的所有属性移除这些属性
		QueryWrapper<AttrEntity> queryWrapper =
				new QueryWrapper<AttrEntity>()
						.eq("catelog_id", catelogId)
						.eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
		
		if (attrIds != null && attrIds.size() > 0) {
			queryWrapper.notIn("attr_id", attrIds);
		}
		
		//判断是否有参数进行模糊查询
		String key = (String) params.get("key");
		if (!StringUtils.isEmpty(key)) {
			queryWrapper.and((w) -> {
				w
						.eq("attr_id", key)
						.or()
						.like("attr_name", key);
			});
		}
		IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);
		
		PageUtils pageUtils = new PageUtils(page);
		
		
		return pageUtils;
	}
	
	@Override
	public List<Long> selectSearchAttrs(List<Long> attrIds) {
		List<Long> searchAttrIds = this.baseMapper.selectSearchAttrIds(attrIds);
		
		return searchAttrIds;
	}
	
}